[PATCH 6.4 426/800] ASoC: imx-audmix: check return value of devm_kasprintf()

Greg Kroah-Hartman
2023-07-16T20:13:37Z

From: Claudiu Beznea <claudiu.beznea@microchip.com>

[ Upstream commit 2f76e1d6ca524a888d29aafe29f2ad2003857971 ]

devm_kasprintf() returns a pointer to dynamically allocated memory.
Pointer could be NULL in case allocation fails. Check pointer validity.
Identified with coccinelle (kmerr.cocci script).

Fixes: b86ef5367761 ("ASoC: fsl: Add Audio Mixer machine driver")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20230614121509.443926-1-claudiu.beznea@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/fsl/imx-audmix.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/sound/soc/fsl/imx-audmix.c b/sound/soc/fsl/imx-audmix.c
index b2c5aca92c6bf..f9ed8fcc03c48 100644
--- a/sound/soc/fsl/imx-audmix.c
+++ b/sound/soc/fsl/imx-audmix.c
@@ -228,6 +228,8 @@ static int imx_audmix_probe(struct platform_device *pdev)

dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s%s",
fe_name_pref, args.np->full_name + 1);
+ if (!dai_name)
+ return -ENOMEM;

dev_info(pdev->dev.parent, "DAI FE name:%s\n", dai_name);

@@ -236,6 +238,8 @@ static int imx_audmix_probe(struct platform_device *pdev)
capture_dai_name =
devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
dai_name, "CPU-Capture");
+ if (!capture_dai_name)
+ return -ENOMEM;
}

/*
@@ -269,6 +273,8 @@ static int imx_audmix_probe(struct platform_device *pdev)
"AUDMIX-Playback-%d", i);
be_cp = devm_kasprintf(&pdev->dev, GFP_KERNEL,
"AUDMIX-Capture-%d", i);
+ if (!be_name || !be_pb || !be_cp)
+ return -ENOMEM;

priv->dai[num_dai + i].cpus = &dlc[2];
priv->dai[num_dai + i].codecs = &dlc[3];
@@ -293,6 +299,9 @@ static int imx_audmix_probe(struct platform_device *pdev)
priv->dapm_routes[i].source =
devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
dai_name, "CPU-Playback");
+ if (!priv->dapm_routes[i].source)
+ return -ENOMEM;
+
priv->dapm_routes[i].sink = be_pb;
priv->dapm_routes[num_dai + i].source = be_pb;
priv->dapm_routes[num_dai + i].sink = be_cp;
--
2.39.2